Saw-sharpening gauge



Apr 1929- c. N. M CLINTOCK SAW SHARPENING GAUGE Filed April 16, 1928 INIAENTOR. CHARLES Al. M CLINTOCK,

A TTORNE Y.

Patented Apr. 9, 1929.

aw a

would CHARLEEi MCGLINTOGK, 0F llltilliliil, ll'llECIE-IIGJ-ll'tl'.

SAWfiHAHPIENING' Application filed April 16, {Serial Ne. 2% 5555.

lily invention relates to saw sharpening}; gauges.

As is well loiown, considerable difficulty is experienced in the proper sharpening oi saws, particularly criiisscut saws, by those not particularly skillful. in the sharpening of a cross cut saw, alternate teeth must be sharpened, whereby their bevels extend in opposite directions. This is accomplished by filing within alternate notches occurring between the teeth. An inexperienced operator frequently fails to follow the alternate sharpening oi the teeth, and. when this is done the proper bevel or angle of the teeth may not be obtained, or the teeth may be cut down at their bases,.to ditlerent elevations.

The present invention seeks to overcome these diihculties, which is accomplished by the provision. of a very simple and inexpengauge. The gauge is in the form of a preferably square bar which is case-hardened. (hi the edges of the bar are cut the garage openings or notches, with filler teeth. between thorn, which are adapted to cover or block the alternate teeth of the saws, which are not to be sharpened while one set of the teeth are being sharpened. I have found that the two sets of gauge openings or notches, with the filler teeth may be formed at one edge of the bar, where the saw teeth are larger, it is preferred "to form one of gauge notches upon one edge and. the companion set of notches upon. the

next edge.

The bar is held to the side of the saw, adjacent to the teeth by simple clamps, and the bar may be readily adjustedv to bring the proper setot notches into registration with the set of teeth to be sharpened. Each bar may carry a plurality oi sizes of gauges or notches.

In the accompanying drawings, forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a perspective View of a saw sharpening gauge einbod g ing my invention,

Figure 2 is an enlarged fragmentary View showing the gauge applied to the saw, illustrating the two sets of gauge notches, tormed upon one edge 01" the bar,

Figure 3 is a transverse section taken on line 3-3 of Figure 2,

Figure 4-. is a similar view taken on line i i of Figure 2, and,

pairs of gauge notches or recesses 11 and 12,.

which are V-shaped, as shown. These pairs of notches are separated by covering; teeth 1.3, which extend above the notches, for a substantial distance, shown. The notches l1 and 12 are of the same shape and have the longitudinal axes of their side walls arranged at the same angle. Alternate side walls ofthe notches l1 and 12 are longitudinally parallel.

The side walls of the notches lit and 12 are set at the same angle as the side walls oi the teeth 14; of the saw 15. The set of notches ll have their side walls transversely beveled in. one direction, as indicated by the arrow 16, while the notches 152 have their side walls transversely beveled in. an opposite direction, as shown at 1.7.

The bar 10 may be provided upon each of its edge-as with the sets of gauge notches and ccwiring; teeth, the same being made in different sizes, for (so-action with we having teeth of ditlereut gauges.

In the use of the gauge, the bar 10 is arranged upon one side of the saw blade, and the ends of the bar are inserted in hollc rectangular clamps 17. These clamps carry clamping screws 18, which serve to bind the bar to the saw blade. The bar 10 adjusted so that the notches 1]. will register with the openings 14; between alternate teeth, the walls oi? e notches b g slightly beneath the Walls or said open gs, depending upon the extent o narpening desired. The operator stands upon the side o1 the saw remote from. the bar 10 and since the covering; teeth 13 tend across alternate openings, erted in the uncovered openings. proceeds in the usual manner and the notches Ii. will s r to guide the his giving the proper angle, and will also limit the ext-cut cit tiling. In this manner, one alternate set of teeth 14!; are sharpened, after which the bar 10 is adjusted so that the notches 12 register with the spaces 14 beof gauge notches 19 are provided, which are V-shaped. These gauge notches are spaced by covering teeth 20, alternately arranged therewith. The gauge notches have their side walls arranged at the same angle, whereby alternate side walls are parallel. The side walls of the gauge notches are longitudina-ll parallel with the side walls of the teeth 0 the saw. The side walls of the notches19 are transversely beveled in the same direction, as indicated by the arrows 21. Only one set of gauge notches 19 are I formed upon one edge, while the other set of gauge notches 19 is formed upon the next edge, the construction and arrangement beingidentical, excepting that the side walls ofthese notches are transversely beveled in. .an opposite direction, as indicated by the arrows 22..

In the use of this form of gauge, the bar is held upon the saw so that the notches l9 register with the notches between alternat'e teeth, while the cover teeth'20, cover the notches between alternate teeth. Hence only one set of saw teeth may be sharpened. The other set is sharpened by turning the bar upon its longitudinal axis to present the other set of notches into registrationwith the notches between the saw teeth, which have not been sharpened.

It is to be understood that the forms of my invention, herewith shown and described, are to be taken as preferred examples of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of my invention, or the scope of the sub joined claims.

Having thus described my invention, I claim:

1. A saw sharpening gauge comprising a rectangular bar provided upon its edges with gauge notches, said bar being adapted to be turned upon its longitudinal axis so that se lected notches may be presented to the spaces between the saw teeth, and means to clamp the bar to the saw blade.-

2. A saw sharpening gauge comprising a bar rectangular in cross section for providing edges, said edges being provided with gauge notches, and loop clamps to receive the ends of the bar and to also receive the saw blade.

3. A saw sharpening gauge comprisin, a bar which is polygonal in cross section for affording edges, said edges being provided with spaced pairs of gauge notches and covering teeth, said covering teeth being arranged between the pairs of gauge notches.

4. A saw sharpening gauge comprising a bar having an edge, said bar being provided upon said edge with spaced gauge notches and covering teeth, said covering teeth being arranged between the gauge notches.

In testimony whereof I aflix my signature.

CHARLES N. MOCLINTOCK. 

